Cooling system for automobile-engines



R. F. CRAWFORD.

COOLING SYSTEM FOR AUTOMOBILE ENGINES.

APPLICATION FILED MAYILYIQZI.

1,400,805 Patented Dec. 20, 1921.

2 SHEETS-SHEET l.

R. F. CRAWFORD.

COOLING SYSTEM FOR AUTOMOBHE ENGINES.

APPLICATION FILED MAY12.1921.

Patented Dec. 20, 1921.

2 SHEETS-SHEET 2.

RALPH r. onawronn, or sauna, KANSAS.

COOLING SYSTEM FOR AUTOMOBILE-ENGINES Specification of Letters Iatent.

Patented nee. an, 1921.

Application filed May 12, 1921. Serial No. 468,952.

To all whom it may concern:

Be it known that I, RALPH F. CRAWFORD, a citizen of the United States, resident of Salina, in the county of Saline and State of Kansas, have made a certain new and useful. Invention in Cooling Systems for Automobile-Engines; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 is a side view of the invention, as applied.

Fig. 2 is a section on the line 22, Fig. 1.

Fig. 3 is a detail perspective view of the rotor.

Fig. & is a side View of a modification of the invention.

Fig. 5 is a plan view of the same.

Fig. 6 is a section on the line 6-6, Fig. 5.

The invention has relation to cooling systems for the engines of automobiles having supplemental power take-01f devices.

The object of the invention is to provide means for augmenting the cooling action of the system while said power take-ofi? device is in operation. Other objects and advantages will hereinafter appear.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

In the embodiment herein primarily shown and described the invention is applied to a car equipped with the power takeofl device of my co-pending a plication for patent Serial No. 387 ,57 6; ant to an engine employing a circulatory thermo-siphon cooling system, but is obviously capable of modification to adapt it for use with other takeoff devices and with other cooling systems.

In the accompanying drawings, illustrating the invention, the numeral 1 designates the radiator of an automobile, 2 the water jacket of the engine, 3 the upper and 4: the lower piping connection between the radiator and the jacket. The ordinary radiator fan is shown at 5, and 6 designates the pulley shaft of the take-off device, adapted for operation alternatively with the propeller shaft of the car.

A rotary pump 7 is interposed in the pipe 4, said pump comprising a shaft 8, supported at one end in a recess 9 of frame plate 10, intermediately in a bearing 11 of plate 12, and at its other end in abushing 13, secured to the frame of the car. The bearing 11 1s provided with a suitable packing devlce 14:, and between this bearing and the bush ng 13 is mounted a worm gear 15, mesh ng with a worm gear 16 mounted upon a horizontal shaft 17; The rear end of shaft 17 has gearing connection 18 with the pulley shaft 6, and intermediately of the gears 16 and 18 a pulley 19 may be provlded, wherefrom a governor 20 is driven. The rotor 21 of the pump, mounted in the chamber formed by the plates 10 and 12, is preferably formed with three reversely curved arms 22, as illustrated in Fig. 3 of the drawings.

It is, of course, common to use pump means in connection with an automobile englne cooling system, but such a pump, constantly driven during the operation of the engine, in the usual manner, would fail if used in connection with a car equipped with a power take-off device, either through undercooling when running in belt or through over-cooling when driving the propeller Y shaft and when running in neutral.

In the present arrangement, when the power take-off device is not in use, the pulley shaft 6 being idle, the pump is not run, circulation taking place through said pump in the ordinary manner. The pump is designed to be run at a speed sufficient to provide for an increase in rapidity of circulation through the radiator and a consequent greater cooling action upon the water, which will be proportional to the need while operating the power take-off device.

\Vhile, as stated, the pumps now in use would fail to provide the variable degree of cooling required by the engine of a car equipped as above, yet obviously, the object of the present invention could be attained by providing a variably driven pump in place of the alternatively driven or idle pump above described.

Such a construction is illustrated in Figs. 4, 5 and 6 of the drawings, wherein a pump 7 is mounted upon a sleeve 23, supported upon the generator shaft 241: of the engine 2. A short shaft 25, driven from shaft 24: by gears 26, carries shift gearing 27, adapted to mesh with variable speed gears 28, fast upon sleeve 23, this shift gearing having connections 29 with a crank arm 30 upon the operating shaft 31 ofthe take-off clutch (illustrated in application 387,576, hereinbefore referred to). Thus the pump 7 normally running in low gear, will he shifted into high gear as the pulley shaft of the power take-off device is thrown in clutch, and the necessary augmented cooling of the engine will be provided for.

I claim:

1. The combination with an automobile having a circulatory thermo-siphon engine cooling system and a supplemental power take-off device including a pulley shaft, of a rotary pump interposed in said cooling system, and means including a worm gear with said pulley shaft and with said pump. 25

In testimony whereof I aflix my signature 7 1n presence of two witnesses.

R. F. CRAWFORD.

Witnesses I J. F. CoRoER, H. A. MANKER. 

